QCD condensates with flavor SU(3) symmetry breaking

Abstract

We investigate the effects of flavor SU(3)-symmetry breaking on the QCD condensates, based on the nonlocal effective chiral action from the instanton vacuum, focusing on the quark-gluon mixed one. We employ two different parameterizations for the dependence of the momentum-dependent dynamical quark mass on the strange current quark mass. We obtain the ratios of the mixed condensates:$[<\bar{s}{\sigma }_{\mu \nu }{G}^{\mu \nu }s><\bar{u}\text{sig}m{a}_{\mu \nu }{G}^{\mu \nu }u>{]}^{1/5}=0.87$. It turns out that the dimensional parameter $m_0^2=<\bar{q}{\sigma }_{\mu \nu }{G}^{\mu \nu }q>/<\bar{q}q>=1.60\sim 1.92{\mathrm{GeV}}^2$.

Comments: 4 pages, 2 figures, Talk given at YITP international workshop "Hadrons at finite density (HFD06)" Kyoto, Japan, 20~22 Feb 2006